syzkaller login: [ 86.025355] BUG: Bad rss-counter state mm:00000000dd2c3075 type:MM_FILEPAGES val:33 [ 86.026748] BUG: Bad rss-counter state mm:00000000dd2c3075 type:MM_ANONPAGES val:22 [ 86.168275] ================================================================== [ 86.169353] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 86.170481] Read of size 8 at addr ffff88800ef93c20 by task sshd/220 [ 86.171433] [ 86.171652] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 86.172673] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 86.173653] Call Trace: [ 86.173983] [ 86.174268] dump_stack_lvl+0x91/0xf0 [ 86.174753] print_report+0xcc/0x620 [ 86.175230] ? __virt_addr_valid+0x102/0x340 [ 86.175773] ? vma_interval_tree_remove+0xc75/0xec0 [ 86.176394] ? vma_interval_tree_remove+0xc75/0xec0 [ 86.177007] kasan_report+0xbe/0xf0 [ 86.177480] ? vma_interval_tree_remove+0xc75/0xec0 [ 86.178112] vma_interval_tree_remove+0xc75/0xec0 [ 86.178712] vma_prepare+0xc54/0x11a0 [ 86.179183] __split_vma+0x5af/0x950 [ 86.179655] ? __pfx___split_vma+0x10/0x10 [ 86.180183] ? find_held_lock+0x2c/0x110 [ 86.180694] do_vmi_align_munmap+0x2ba/0x11f0 [ 86.181255] ? lock_is_held_type+0x9f/0x120 [ 86.181790] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 86.182417] ? mtree_range_walk+0x632/0x900 [ 86.182968] ? mas_walk+0x5c7/0x7c0 [ 86.183442] do_vmi_munmap+0x1f1/0x2b0 [ 86.183930] mmap_region+0x1f9/0x2660 [ 86.184408] ? vm_mmap_pgoff+0x15c/0x3a0 [ 86.184920] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 86.185636] ? __pfx_lock_acquire+0x10/0x10 [ 86.186181] ? __pfx_mmap_region+0x10/0x10 [ 86.186709] ? security_mmap_addr+0x7d/0xa0 [ 86.187234] ? get_unmapped_area+0x1f5/0x3f0 [ 86.187783] do_mmap+0x854/0xf00 [ 86.188225] vm_mmap_pgoff+0x1a6/0x3a0 [ 86.188719] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 86.189277] ksys_mmap_pgoff+0x3af/0x500 [ 86.189781] do_syscall_64+0x3f/0x90 [ 86.190311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 86.190973] RIP: 0033:0x7f7b676e1d82 [ 86.191437] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 86.193559] RSP: 002b:00007fff700a9098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 86.194469] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b676e1d82 [ 86.195312] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b66b1b000 [ 86.196156] RBP: 00007f7b66b1b000 R08: 0000000000000009 R09: 0000000000001000 [ 86.196999] R10: 0000000000000812 R11: 0000000000000206 R12: 00005640bb173f70 [ 86.197853] R13: 00007fff700a90b0 R14: 00007fff700a90e0 R15: 00007fff700a9440 [ 86.198726] [ 86.199022] [ 86.199236] Allocated by task 213: [ 86.199666] kasan_save_stack+0x22/0x50 [ 86.200170] kasan_set_track+0x25/0x30 [ 86.200661] __kasan_slab_alloc+0x59/0x70 [ 86.201189] kmem_cache_alloc+0x16b/0x370 [ 86.201701] vm_area_dup+0x20/0x160 [ 86.202169] __split_vma+0x170/0x950 [ 86.202641] split_vma+0xc6/0x110 [ 86.203082] mprotect_fixup+0x8d2/0xb30 [ 86.203586] do_mprotect_pkey+0x87e/0xd40 [ 86.204103] __x64_sys_mprotect+0x78/0xc0 [ 86.204622] do_syscall_64+0x3f/0x90 [ 86.205094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 86.205732] [ 86.205956] Freed by task 19: [ 86.206337] kasan_save_stack+0x22/0x50 [ 86.206834] kasan_set_track+0x25/0x30 [ 86.207328] kasan_save_free_info+0x2b/0x50 [ 86.207856] __kasan_slab_free+0x10a/0x190 [ 86.208385] kmem_cache_free+0x10d/0x4d0 [ 86.208890] rcu_core+0x8c8/0x2860 [ 86.209334] __do_softirq+0x1b7/0x7d4 [ 86.209806] [ 86.210039] Last potentially related work creation: [ 86.210623] kasan_save_stack+0x22/0x50 [ 86.211119] __kasan_record_aux_stack+0x8e/0xa0 [ 86.211737] __call_rcu_common.constprop.0+0x6a/0xb90 [ 86.212387] remove_vma+0x139/0x170 [ 86.212839] do_vmi_align_munmap+0xd4a/0x11f0 [ 86.213400] do_vmi_munmap+0x1f1/0x2b0 [ 86.213882] __vm_munmap+0x138/0x3a0 [ 86.214366] __x64_sys_munmap+0x59/0x80 [ 86.214865] do_syscall_64+0x3f/0x90 [ 86.215344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 86.215982] [ 86.216200] The buggy address belongs to the object at ffff88800ef93bc8 [ 86.216200] which belongs to the cache vm_area_struct of size 168 [ 86.217668] The buggy address is located 88 bytes inside of [ 86.217668] freed 168-byte region [ffff88800ef93bc8, ffff88800ef93c70) [ 86.219081] [ 86.219296] The buggy address belongs to the physical page: [ 86.219951] page:0000000028cabeda refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef93 [ 86.221039] memcg:ffff888009beff01 [ 86.221470] flags: 0x100000000000200(slab|node=0|zone=1) [ 86.222126] page_type: 0xffffffff() [ 86.222578] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 86.223493] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009beff01 [ 86.224396] page dumped because: kasan: bad access detected [ 86.225052] [ 86.225268] Memory state around the buggy address: [ 86.225846] ffff88800ef93b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 86.226709] ffff88800ef93b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 86.227561] >ffff88800ef93c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 86.228404] ^ [ 86.228934] ffff88800ef93c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 86.229785] ffff88800ef93d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 86.230714] ================================================================== [ 86.231727] Disabling lock debugging due to kernel taint [ 88.143868] BUG: Bad rss-counter state mm:00000000bb1692f9 type:MM_FILEPAGES val:33 [ 88.144919] BUG: Bad rss-counter state mm:00000000bb1692f9 type:MM_ANONPAGES val:22 [ 88.675301] BUG: Bad rss-counter state mm:000000001979e09a type:MM_FILEPAGES val:33 [ 88.676466] BUG: Bad rss-counter state mm:000000001979e09a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28560' (ECDSA) to the list of known hosts. 2023/06/19 18:52:40 fuzzer started 2023/06/19 18:52:41 dialing manager at localhost:44161 2023/06/19 18:52:41 checking machine... 2023/06/19 18:52:41 checking revisions... [ 89.288612] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:52:41 testing simple program... [ 89.339936] cgroup: Unknown subsys name 'net' [ 89.375055] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:51:45 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff8450d49f RCX=ffffffff864bb001 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffffffff8450d49f RBP=ffffffff8450d49f RSP=ffff88806ce09a60 R8 =ffffffff864bb032 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888016ff12e0 RIP=ffffffff811fc7be RFL=00000296 [--S-AP-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f7a8b55e000 CR3=000000000dc5e000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2030343a32353a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a32353a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85dfcf14 RCX=ffffffff8180ee7d RDX=0000000000000001 RSI=ffffffff86137cac RDI=ffffffff85dfcf14 RBP=ffffffff85dfcf14 RSP=ffff88801c9b6c20 R8 =ffffffff86137cac R9 =ffff88801c9b6d18 R10=0000000000038001 R11=0000000000020ed0 R12=ffffffff85dfcf18 R13=ffffffff85dfcf14 R14=ffffffff85dfcf14 R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000257 [---ZAPC] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f14c3533900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f14c34fd008 CR3=000000001ab5a000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000